Page History

pollingConsumerQueueSize

1000

Camel

2.14/2.13.1/2.12.4:

The

queue

size

for

the

internal

handoff

queue

between

the

polling

consumer,

and

producers

sending

data

into

the

queue.

pollingConsumerBlockWhenFull

true

Camel 2.14/2.13.1/2.12/4:

Whether

to

block

any

producer

if

the

internal

queue

is

full.

pollStrategy

A pluggable

org.apache.camel.PollingConsumerPollingStrategy

allowing

you

to

provide

your

custom

implementation

to

control

error

handling

usually

occurred

during

the

poll

operation

before

an

Exchange

have

been

created

and

being

routed

in

Camel.

In

other

words

the

error

occurred

while

the

polling

was

gathering

information,

for

instance

access

to

a

file

network

failed

so

Camel

cannot

access

it

to

scan

for

files.

The

default

implementation

will

log

the

caused

exception

at

WARN

level

and

ignore

it.

sendEmptyMessageWhenIdle

false

Camel 2.9:

If

the

polling

consumer

did

not

poll

any

files,

you

can

enable

this

option

to

send

an

empty

message

(no

body)

instead.

startScheduler

true

Whether the scheduler should be auto started.

initialDelay

1000

Milliseconds before the first poll starts.

delay

500

Milliseconds before the next poll.

useFixedDelay

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details. In Camel 2.7.x or older the default value is false. From Camel 2.8 onwards the default value is true.

timeUnit

TimeUnit.MILLISECONDS

time unit for initialDelay and delay options.

runLoggingLevel

TRACE

Camel 2.8: The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

scheduledExecutorService

null

Camel 2.10: Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool. This option allows you to share a thread pool among multiple consumers.

greedy

false

Camel 2.10.6/2.11.1:

If

greedy

is

enabled,

then

the

ScheduledPollConsumer

will

run

immediately

again,

if

the

previous

run

polled

1

or

more

messages.

scheduler

null

Camel 2.12:

Allow

to

plugin

a

custom

org.apache.camel.spi.ScheduledPollConsumerScheduler

to

use

as

the

scheduler

for

firing

when

the

polling

consumer

runs.

The

default

implementation

uses

the

ScheduledExecutorService

and

there

is

a

Quartz2

,

and

Spring

based

which

supports

CRON

expressions.

Notice:

If

using

a

custom

scheduler

then

the

options

for

initialDelay

,

useFixedDelay

,

timeUnit

,

and

scheduledExecutorService

may

not

be

in

use.

Use

the

text quartz2 to refer to use the Quartz2 scheduler; and use the text spring to use the Spring based; and use the text #myScheduler to refer to a custom scheduler by its id in the Registry. See Quartz2 page for an example.

scheduler.xxx

null

Camel 2.12: To configure additional properties when using a custom scheduler or any of the Quartz2, Spring based scheduler.

backoffMultiplier

0

Camel 2.12: To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

backoffIdleThreshold

0

Camel 2.12: The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

backoffErrorThreshold

0

Camel 2.12: The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.